I am formulating a vendor/supplier rating system for a small manufacturer. I used AHP to prioritize the criterion for rating vendors. Now I am in a fix as they have more than 40 vendors, therefore I cannot go for pairwise comparison of vendors. Will it be okay if I use AHP only for criterion and use ratings for vendors in order to rate them?
Hi naman,
AHP is a method can be used for alternative ranking and criterion weights. I suggest you to apply AHP to compute rating of each criterion, then to rate the performance of 40 vendors, normal ranking-based MADM tools as TOPSIS, VIKOR, COPRAS etc. can help you as well.
Any help i would be happy,
Morteza
Fully agree with Morteza, use a different method for alternative evaluation. It seems this question comes up often. See also for example the answers here:
https://www.researchgate.net/post/Could_I_do_AHP_with_a_regular_scales_questionnaire#view=5726f04596b7e4ff526d6ee5
Thanks to both of you. I am still working on the case and thought of going with TOPSIS as per your suggestion(also it appears to be simple in application).
I will update once I come up with a working solution.
Yes, AHP is composed of two stages. The first one determines criteria weights. The second uses them to select alternatives.
Consequently you can use the first stage and then apply the found weights with other systems such as PROMETHEE, or TOPSIS
For those that used AHP, two ways to evaluate the alternatives were observed (Wallenius et al, 2008): rating, also called absolute judgment, for the analysis of quantitative criteria and pairwise or relative judgment (Wallenius et al, 2008), for the analysis of qualitative criteria. The rating method can be considered a more efficient method in a situation where many alternatives are available (Saaty, 2008).
Saaty TL. Decision making with the analytic hierarchy process. Int J Serv Sci 2008;1:83-98.
Wallenius J, Dyer JS, Fishburn PC, Steuer RE, Zionts S, Deb K. Multiple Criteria Decision Making, Multiattribute Utility Theory: Recent Accomplishments and What Lies Ahead. Manage Sci 2008;54:1336–49.
Totally agree with Dr. Munier,
I am sure that you can use AHP to determine criteria weights then you can use TOPSIS can be well in order to determine the ranking. However be careful method shows drawback on doesn´t considere correlation on criteria
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